[co19] Roll co19 to 9849573cd1b8317e58247b8c1672e89b1cd842e2
[co19] Roll co19 to 9849573cd1b8317e58247b8c1672e89b1cd842e2

2022-05-09 stereotype441@gmail.com Fix type of onError. (dart-lang/co19#1339)

Change-Id: I78b2c218acb97881b9feb05e74c9775a2f6cd360
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/244102
Commit-Queue: William Hesse <a821cddceae7dc400f272e3cb1a72f400f9fed6d@google.com>
Reviewed-by: Alexander Thomas <29642742b6693024c89de8232f2e2542cf7eedf7@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk